Water preheater for boilers



April 13 1926. 1,580,835

A. MGCORMCK WATER PREHEATER FOR BO-ILERS EigL 2 Sheets-Sheet l FiledMarch 12,

/L/ /ff/ Ama m 192. 1,580,835

A. MCCORMICK WATER PREHEATER. FOR BOILERS Filed March l2 19215 2Sheets-Sheet 2 Patented Apr. 13, 1926.

ANDREW MCCORMICK, OF NAS-IVILLE, ARKANSAS. I

WATER PREHEATER FOB BOILERS.

Application filed March 12, 1.923. Serial No. 624,426.

To all whomy 'it may concern i Be it known that I, ANDREW MoConMioK, acitizen of the United States, and a resident of the city of Nashville,county of Howard, and State of Arkansas, have invented ycertain new anduseful Improvements in vWater Preheaters for Boilers, of which thefollowing is a specification.

My invention relates to water preheaters for boilers, and moieparticularly to means for utilizing exhaust steam from various auxiliaryappliances upon a locomotive, such as the headlight motor, the pump, orsimilar devices, for prelieating feed water be* foro its delivery to thelocomotive boiler.

Other objects will appear hereinafter.

The invention consists in the combinations and arrangements of partshereinafter described and claimed.

The invention will be best understood by reference to the accompanyingldrawings forminga part of this specification, and in which,

Fig. 1, is a side elevation of a locomotive showing the preheating meansapplied thereto, parts of tli-e locomotive and preheating means beingbroken away to more clearly illustrate the construction and applicationof the invention,

Fig. 2, is an enlarged fragmentary view of the connection between theauxiliary heating means of the device and the preheating feeding means,

Fig. 3, is a fragmentary rear elevation of a locomotive boiler showingthe invention applied thereto, and n Fig. 1, is a sectional view of theiiivention taken on line L.1 -L1 of Fig. 1.

Referring to the drawings 5 represents a locomotive boiler having theusual fire box 6, water chamber 7, fire tubes 8 and smoke stack 9. Thelocomotive may also be equipped with a steam driven headlight motor 10and pump 11, as well as other steam driven devices not shown, all in theordinary manner.

The invention comprises a. heater casing 12 in the form of a hollow.cylinder, and preferably disposed at one side of the locomotive andsecured to the running board 13 thereof by means of suitable brackets14; and a similar casing 15 is preferably mounted upon the running board16 at the opposite side of the locomotive iii a similar mannel', TheCaSings l2 and 15 preferably are in communication with each other bymeans of a pipeA 17' which connects the forward ends of suoli casings.Preferably communicating with tlie'casing 12, at the rear ent thereof,is an exhaust pipe 18 leading to the pump 11, and an exhaust pipe 19leading tothe headlight motor 10. rthe heater casing 15. is providedwith an outlet pipe 2O at its rear 'end which preferably eX- tends toand opens into the smoke stack 9, so that exhaust steam from the pipes18 and 19 iows into the rear end of thecasing 12,l passes forwardlytherein and into the casing 15 by means of the pipe 17, emerg ing fromthe casing 15 at its rear end and beingV conducted to the smoke stack 9by means of the pipe 20.

Disposed Awithin the heater casing 12is a coil 21, the end 22 of whichisconnected to a suitable device such as a steam injector 23 of av typeordinarily used to force water into the boiler, there also being a feedpipe 24 communicating with a water supply and connected to the injectorin the ordinary manner. The other 'end- 25 of the coil 21 is connectedto a check valve 26 of any well known construction, suoli check yvalvehaving a nozzle 27 leading into the water chamber 7 of the locomotive.The rear end of the casing 12 may be provided with suitable glandsfor'rendering the casing steam tight and at the same time permitting eX-pansion and contraction of the coil ends. The heater casing 15 is alsoprovided with a coil similar to the coil 21, having its end 28 connectedtoY an injector 29, vor other suitable device, the opposite end 30 ofsaid coil being connected to a check valve 31 of ordinary constructionwhich communicates withthe water chamber 7 of the locomotive in the samemannerV as described for the valve 26, the construction of the twocasings and parts being identical. The heater casings 12 and 15, thepipes, and the parts of the device are preferably covered with suitableheat retaining material as shown at 34. A steam pipe 32 may be connectedwith a head having distributing valves 33, for the CAD Cil

the casing 15, and emerging therefrom at the rear end, from whence it is'conduct-ed to the smoke stacker other suitable outlet by means of thepipe 20. Ifvfhenfit is desired to feed Water through the heat-ing coils,the Water from the pipes 24 is admitted to the injectors 8 and 29,Which'for'ce it throngh the coils in the casings 12 and 15, and throughthe checl; valves 2G and-'Slime the Water chamber 7 ot' the locomotive.

Extending through the tire box v6, side 'by side, are pipes ot anyvsuitable size and materialone ot Which isshoivn at 85 in Figs. l andthe outer endoic the pipe StB-being disposed opposite to and slightly'spaced from the nozzle Q7 of the check valve 26, the other pipe, notshown` beinedisposed opposite and slightly spaced from thenozzle of thecheck valve 31, the inner rends of such pipes communieating,` with` theWater chamber 7 of the boiler. By this varrrangement vwhen the`injectors are not operatingyand no feed' Water is being' deliveredtothe boiler, the fact that the pipesar spaced from the nozzles of thevalves'QG and 31 Will permita 'tree circulation oit Water through suchpipes. Then the injectors v'operate to force the Water through the coilsand through the check valves '25 and 3l, the nozzles ot the valves willdeliver the Water tothe Water chamber at the far side 'et the 'tire box6 through the pipes disposed inthe fire boX, thereby heating' the Waterto a. high temperature. p p

`While I have illustrated and described the preferred 'orm ofconstruction for carrying my invention into 'e'tfect, this is capable ofvariation and modification Without departing` from the spirit of theinvention. I, therefore, do not Wish to be limited to the precisedetails of constrnctionset forth, but desire to avail myself of suchvariations and modiiications as come Within'the scope of the appendedclaims.

'said casings, said steam iioiving through said casing and pipe and intoand through the other casing; a pipe extending from the last saidcasingv into the smolre stach; a coil disposed in each o1n4 saidcasing-s and leading vinto the rear `ot said boiler; and means forforcing` water through said coils into said boiler.

2. The combination with a locomotive havinga boiler; a heater casina`mounted at eaeh'side ot' said locomotive; apipe eXtending through saidlocomotive and connecting the forward ends et said casings with eachother; a steam operated air-pump and headlight motor mounted on saidlocomotive; means for introducing the exhaust steam tromsaid pump andmotor into the rear end ot' one o'lf said casings, said rsteam iowingrthrough 4said easing' and pipe into and through the other casing; a pipeextending romthe last said casing into the smoke stack to lead theexhaust steam thereinto: injectors mounted on lsaid locomotive; andheating coils mounted in said heater casings, one end of each of saidcoils being' connected With an injector, the opposite ends of said coilsbeing` provided with nozzles extending into the Water chamber throughthe rear wvall of said boiler.

In testimony whereof I have signed my name to this specliication.

ANDREl/V vliIoCORlvIICK.

